368 ASCLEP1ADACEJE. (MILKWEED FAMILY.) 
four ; pedicels capillary ; divisions of the corolla oblong (pale pink) ; 
hoods of the white crown elliptical-ovate, the incurved horn short 
and thick; pods linear-lanceolate, smooth. — Dry woods and hills, 
common. June. — Leaves 2' -4' long, variable on the same plant, 
sometimes all opposite, rarely with two whorls. Umbels 2-5; pe¬ 
duncles V -long: the handsome flowers barely half as large as in 
Nos. 5 and 1. 
7. A. ©I>tiisifdlia, Michx. (Wavy-leaved Milkweed.) 
Smooth and glaucous; stem simple (2°-3° high), bearing a single 
long-peduncled terminal umbel; leaves oblong or ovate-elliptical , very 
obtuse but mucronate, sessile and partly clasping by a heart-shaped 
base , the margins very wavy ; pedicels very numerous, elongated ; di¬ 
visions of the corolla oblong (greenish-purple); hoods of the crown 
truncate and somewhat toothed at the summit, shorter than the slen¬ 
der awl-pointed horn; pods smoothish. — Sandy woods and fields, 
not rare, especially southeastward. July. — Leaves 3' - 5' long. 
Flowers larger than in No. 1. 
8. A. rul>ra, L. (Red-flowered Milkweed.) Smooth, 
slender (1°-2P high), bearing 1-3 few-flowered umbels at the naked 
summit of the stem ; leaves ovate-lanceolate or oblong-ovate , tapering to 
a very sharp point , rounded or slightly heart-shaped at the base , very 
short-petioled ; divisions of the corolla lanceolate, acute (reddish-pur¬ 
ple); hoods of the crown oblong, acutish (purple tinged with orange), 
with an awl-shaped and slightly incurved short horn; pods smooth. 
(A. laurifblia, Michx. A. acuminkta, Pursh.) — Low grounds, New 
Jersey, Penn., and southward, rare. July.— Leaves 2 1 - 4' long, rough- 
ciliate. Umbel mostly solitary on a peduncle 2 ; - 3' long. 
9. A. paupercula, Michx. (Slender Long-leaved Milk¬ 
weed.) Very smooth ; stem wand-like , slender (2^-3° high), bearing 
1 - several few-flowered umbels at the summit of a naked and usually 
elongated terminal peduncle (rarely with one or two lateral ones) ; 
leaves linear, much elongated , slightly petioled; divisions of the (pur¬ 
ple) corolla linear-oblong, half the length of the pedicels; hoods of 
the crown (orange-yellow) spatulate-oblong, much longer than the 
awl-shaped incurved horn. — Wei pine barrens, New Jersey, rare, 
and southward. July, Aug. — Leaves 5 f - 10' long, 1" - 6 n broad; 
the few but showy flowers larger than in No. 1. 
++++ Stem paniculately branching. 
10. A. mcarnata, L. (Swamp Milkweed.) Smooth, or 
nearly so, the stem with two downy lines above and on the branches 
and peduncles ; leaves oblong-lanceolate, acute or pointed, obtuse at 
the base, distinctly petioled ; umbels many-flowered, somewhat pani- 
cled, on peduncles half the length of the leaves ; divisions of the co¬ 
rolla ovate, reddish-purple ; hoods of the crown (flesh-color) ovate, 
about the length of the ascending or scythe-form awl-shaped horns; 
■ m 
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